logger = require("logger-sharelatex")
mongojs = require("../../infrastructure/mongojs")
metrics = require("metrics-sharelatex")
db = mongojs.db
async = require("async")
ObjectId = mongojs.ObjectId
UserGetter = require("./UserGetter")
{ addAffiliation, removeAffiliation } = require("../Institutions/InstitutionsAPI")
FeaturesUpdater = require("../Subscription/FeaturesUpdater")
EmailHelper = require "../Helpers/EmailHelper"
Errors = require "../Errors/Errors"
Settings = require "settings-sharelatex"
request = require 'request'
NewsletterManager = require "../Newsletter/NewsletterManager"

module.exports = UserUpdater =
	updateUser: (query, update, callback = (error) ->) ->
		if typeof query == "string"
			query = _id: ObjectId(query)
		else if query instanceof ObjectId
			query = _id: query
		else if typeof query._id == "string"
			query._id = ObjectId(query._id)

		db.users.update query, update, callback


	#
	# DEPRECATED
	#
	# Change the user's main email address by adding a new email, switching the
	# default email and removing the old email.  Prefer manipulating multiple
	# emails and the default rather than calling this method directly
	#
	changeEmailAddress: (userId, newEmail, callback)->
		newEmail = EmailHelper.parseEmail(newEmail)
		return callback(new Error('invalid email')) if !newEmail?
		logger.log userId: userId, newEmail: newEmail, "updaing email address of user"

		oldEmail = null
		async.series [
			(cb) ->
				UserGetter.getUserEmail userId, (error, email) ->
					oldEmail = email
					cb(error)
			(cb) -> UserUpdater.addEmailAddress userId, newEmail, cb
			(cb) -> UserUpdater.setDefaultEmailAddress userId, newEmail, cb
			(cb) -> UserUpdater.removeEmailAddress userId, oldEmail, cb
		], callback


	# Add a new email address for the user. Email cannot be already used by this
	# or any other user
	addEmailAddress: (userId, newEmail, affiliationOptions, callback) ->
		unless callback? # affiliationOptions is optional
			callback = affiliationOptions
			affiliationOptions = {}
		newEmail = EmailHelper.parseEmail(newEmail)
		return callback(new Error('invalid email')) if !newEmail?

		UserGetter.ensureUniqueEmailAddress newEmail, (error) =>
			return callback(error) if error?

			addAffiliation userId, newEmail, affiliationOptions, (error) =>
				if error?
					logger.err error: error, 'problem adding affiliation while adding email'
					return callback(error)

				update = $push: emails: email: newEmail, createdAt: new Date()
				@updateUser userId, update, (error) ->
					if error?
						logger.err error: error, 'problem updating users emails'
						return callback(error)
					callback()


	# remove one of the user's email addresses. The email cannot be the user's
	# default email address
	removeEmailAddress: (userId, email, callback) ->
		email = EmailHelper.parseEmail(email)
		return callback(new Error('invalid email')) if !email?
		removeAffiliation userId, email, (error) =>
			if error?
				logger.err error: error, 'problem removing affiliation'
				return callback(error)

			query = _id: userId, email: $ne: email
			update = $pull: emails: email: email
			@updateUser query, update, (error, res) ->
				if error?
					logger.err error:error, 'problem removing users email'
					return callback(error)
				if res.n == 0
					return callback(new Error('Cannot remove email'))
				callback()


	# set the default email address by setting the `email` attribute. The email
	# must be one of the user's multiple emails (`emails` attribute)
	setDefaultEmailAddress: (userId, email, callback) ->
		email = EmailHelper.parseEmail(email)
		return callback(new Error('invalid email')) if !email?
		UserGetter.getUserEmail userId, (error, oldEmail) =>
			if err?
				return callback(error)
			query = _id: userId, 'emails.email': email
			update = $set: email: email
			@updateUser query, update, (error, res) ->
				if error?
					logger.err error:error, 'problem setting default emails'
					return callback(error)
				else if res.n == 0 # TODO: Check n or nMatched?
					return callback(new Error('Default email does not belong to user'))
				else
					NewsletterManager.changeEmail oldEmail, email, callback



	updateV1AndSetDefaultEmailAddress: (userId, email, callback) ->
		@updateEmailAddressInV1 userId, email, (error) =>
			return callback(error) if error?
			@setDefaultEmailAddress userId, email, callback

	updateEmailAddressInV1: (userId, newEmail, callback) ->
		if !Settings.apis?.v1?.url?
			return callback()
		UserGetter.getUser userId, { 'overleaf.id': 1, emails: 1 }, (error, user) ->
			return callback(error) if error?
			return callback(new Errors.NotFoundError('no user found')) if !user?
			if !user.overleaf?.id?
				return callback()
			newEmailIsConfirmed = false
			for email in user.emails
				if email.email == newEmail and email.confirmedAt?
					newEmailIsConfirmed = true
					break
			if !newEmailIsConfirmed
				return callback(new Errors.UnconfirmedEmailError("can't update v1 with unconfirmed email"))
			request {
				baseUrl: Settings.apis.v1.url
				url: "/api/v1/sharelatex/users/#{user.overleaf.id}/email"
				method: 'PUT'
				auth:
					user: Settings.apis.v1.user
					pass: Settings.apis.v1.pass
					sendImmediately: true
				json:
					user:
						email: newEmail
				timeout: 5 * 1000
			}, (error, response, body) ->
				if error?
					error = new Errors.V1ConnectionError('No V1 connection') if error.code == 'ECONNREFUSED'
					return callback(error)
				if response.statusCode == 409 # Conflict
					return callback(new Errors.EmailExistsError('email exists in v1'))
				else if 200 <= response.statusCode < 300
					return callback()
				else
					return callback new Error("non-success code from v1: #{response.statusCode}")

	confirmEmail: (userId, email, confirmedAt, callback) ->
		if arguments.length == 3
			callback = confirmedAt
			confirmedAt = new Date()
		email = EmailHelper.parseEmail(email)
		return callback(new Error('invalid email')) if !email?
		logger.log {userId, email}, 'confirming user email'
		addAffiliation userId, email, (error) =>
			if error?
				logger.err error: error, 'problem adding affiliation while confirming email'
				return callback(error)

			query =
				_id: userId
				'emails.email': email
			update =
				$set:
					'emails.$.confirmedAt': confirmedAt
			@updateUser query, update, (error, res) ->
				return callback(error) if error?
				logger.log {res, userId, email}, "tried to confirm email"
				if res.n == 0
					return callback(new Errors.NotFoundError('user id and email do no match'))
				FeaturesUpdater.refreshFeatures userId, true, callback

[
	'updateUser'
	'changeEmailAddress'
	'setDefaultEmailAddress'
	'addEmailAddress'
	'removeEmailAddress'
].map (method) ->
	metrics.timeAsyncMethod(UserUpdater, method, 'mongo.UserUpdater', logger)